Internal-combustion engine



-B. L. CAMPBELL.

INTERNAL COMBUSTION ENGINE.

APPLICATION FILED JUNE 26,1920.

Patented Mar. 28, 1922.

INVENTOB 13.1. (07 015??? By mu/n K ATTORNEYS citizen of the United UNITED STATES PATENT OFFICE.

I Specification of Letters Patent.

Patented -Mar. 28, 1922.

Application filed Julie 26, 1920. Serial No. 392,005.

To all whom it may concern:

Be itknown that I, BERT L. CAMPBELL, a States, and a resident of Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Internal-Combustion Engines,

of which the following is a full, clear, and

' exact description.

' two yinvention relates to improvements in internal combustion engines, and it consists in the combinations, constructions, and arrangements herein described and claimed.

An obj ect of my invention is to provide a cycle internal combustion engine in which the necessity for crank case compression is obviated.

A further object of'my invention is to provide a device of the type described having a fan mounted on the crank shaft and serving as a fly wheel in addition to performing its function as a means for causing circulation of air through the jacket of the cylinder and forcing air into contact with an inflammable liquid to form an explosive mixture fordriving the engine.

A further object of my invention is to provide a device of the type described that is relatively simple in construction and operation and is not likely to get out of order easily.

Other objects and advantages will appear in the following specification, and the novel features of the invention will be articu larly pointed out in the appended claims.

My invention isillustrated in the accom-' panying drawings, forming part of this application, in which i Fig. 1 is a central vertical sect1on, partly I in elevation, through the device,

ig. 4 is an enlarged sectional detall of a fragmentary portion of the device.

In carrying out my invention, I provide a suitable base 1 which may be secured to a base plate 3, or the like, by means of bolts 2, since the device is designed to be stationary. Mounted u on the base 1 is a crank case -1 surmounted by a vertically disposed cylinder having an inner wall 5 which may be formed integrally with the wall of the crank case 1. A piston 6- is mounted for reciprocat on 1n the cylinder. A piston rod- 7 has a pivotal connection at one end with the piston 6 and is pivoted\.at its other end on a crank pin 8, which projects laterally from a crank arm 9. The crank arm 9 is secured intermediate its length to a crank shaft 10 that is journalled in an embossed portion 11 of the wall of the crank case 4 and projects therethrough. A counterweight 12 is carried at the free end ofthe crank arm 9.

A fan 13 having a plurality of radially extendlng spaced apart curved blades 14 is mounted upon the outer end of the crank shaft 10, being rigidly secured thereto. Braces 15 are provided between the blades 14 of the fan 13, which is relatively heavy, since it performs the function of a fly wheel as well as the function ordinarily performed by a fan.

I-then provide a fair housing 16 which may be an integral extension of the base 1 or may be secured to the latter and the wall of the crank case in any suitable manner. A circular central 0 ening 17 is provided in the outer faceof t e fan housing, which, in the form pictured in the drawings, is substantially cylindrical in contour. The fan housing 16 is formed with a, vertically extending tapering extension 18 at its upper end which communicates with an air pipe 19 leading to a cylinder head 20. The latter is provided at the upper end of the inner wall 5 of the cylinder.

The cylinder is air cooled and I therefore provide a second and outer casing 21 that is spaced from the casing 5 to provide an air passage 22 that completely surrounds the inner casing 5. The outer casing 21 is secured to the crank case 4 in any suitable manner as by means of bolts 23 and has a portion of its lower edge bent outwardly and joined to the fan housing 16 at 24, thereby providing a passage 25 from the fan housing to the air passage 22.

A plurality of vertically extending spaced apart radial fins 26 are formed integrally with the inner casing 5, as best seen in Fig. 3 of the drawings, lar air passage 22 a number of vertical flues for guiding currents of air upwardly, thereby assisting in the cooling of the cylinder.

A branch pipe 27 leads from the main air pipe 19 into a container 28 for an inflam mable liquid, communicating therewith at its upper end. The container 28is elevated a and provide in the annuabove the level of the cylinder and is supported by means of a suitable bracket 29 which is Secured at its lower end to the outer casing 21 in any suitable manner as by means of bolts 30.

The container 28 is provided with an outlet 31 in which is disposed a valve 32 having a stem 33 extending upwardly through the walls of the container and controlled by an arm 34 secured to the projecting upper end of the stem 33. A tube 35 leads from the outlet 31 into the air pipe 19 at a point directly above the upper end of the cylinder. The tube 35. has its end terminating in a nozzle 36, whereby a spray is dlscharged from the end thereof.

The outer casing 21 is also provided wlth a head 37 spaced from the head 20 of the inner casing 5 and provided with acentral opening 38 adapted to receive a spark plug 39 which is secured therein in any suitable manner and has its lower end projecting through the head 20 of the inner casing 5. The edges of the head 37 surrounding the central opening 38 are bent downwardly and then outwardly to form a bearing 40 for a disk 41 that is mounted thereon and maintained in position thereby (see Fig. 3). The disk 41 is provided with a plurality of spaced apart arcuate openings 42 adjacent its outer edge. The openings 42 may be moved into registration with openings 43 in the head 37 by means of a handle 44 that is rigidly secured to the disk 41 and projects through an arcuate slot 45 in the head 37. An elongated opening 46 is also provided in the disk 41 about the air supplypipe 19, which would otherwise preclude rotatable movement of the disk 41.

From the foregoing description of the various parts of the device, the operation thereof may be readily understood. At the time the engine is started, the disk 41 is moved into the position pictured in Fig. 3. Consequently, air cannot escape from the passage 22 about the inner casing 5 and after the same has been filled, the inflammable liquid entering into the explosive mixture is subjected to additional pressure. 'Air is drawn into the fan housing 16 and is forced radially therefrom by the centrifugal action of the fan blades and must ass through'the air pipe 19. At the same time, air'passes through the branch pipe 27 into the liquid container 28 at its upper end to prevent back pressure through the pipe 35. The valve 32 is operated manually and the inflammable liquid is projected in the form of spray from the nozzle 36 against the cone 47 which is secured in the pipe 19 by.

means of lugs 48. The air mixes with the inflammable liquid during the passage of the latter through the openings between the cone 47 and the walls of the pipe 19 and a combustible mixture is forced into the cylport 51 is -.provided with inder when a conical valve that is disposed in an inlet in the head 20 is opened. The conical valve 49 has a stem 50 extended through a support 51 that is secured to the" inner walls of the supply pipe 19. The superforations 52. A compression spring 53 is isposed between the support 51 and the valve 49 and normally tends to force the latter downwardly from its seat 54, thereby permitting the explosive mixture to pass into the cylinder. The stem head portion 55 which limits the movement of the valve stem 50 through the support 51 and consequently limits the opening of the The exhaust asses out t rough an exhaust outlet 55'. he suction created by the exhaust, together with the action of the compression spring 53 and the pressure of the air from the pipe 19, opens the valve 49 and permits the combustible mixture to pass into the cylinder. The iston 6 in its return stroke closes the out et 55', and compresses the mixture inthe cylinder, thereby closing the valve 49. The compressed combustible mixture in the cylinder is exploded when the piston 6 reaches the end of its return stroke and the operation just described is repeated. It will be understood that when the engine is in operation, the disk 41 will be rotatably shifted by means of the handle 44 to occasion the registration of the openings 42 and 43, thereby permitting air to pass therethrough from the air passage 22, thus effectually cooling the engine and prevent overheating of the moving parts. I

The device provides an effective means for performing the functions for which a two cycle stationary combustion engine is intended.

I claim:

1. The combination with an internal combustion engine comprising a cylinder and a crank shaft, of a fan-shaped fly-wheel secured to said. crank shaft, a casing for said 50 is formed with an enlarged" fly-wheel, a second casing spaced from and I a crank shaft, of a fan-shaped fly-wheel secured to said crank shaft, a casing for said fly-wheel, a second casing spaced from and adapted to enclose said cylinder, an air pipe said second named casing having a plurality of openings therein, and means for rotating 10 said first named disc with respect to said second named casing, whereby the openings in said disc are brought into or out of registration with the openings in Said second named casing.

BERT L. CAMPBELL. 

